I have a MacBook user who is getting the error "Error: Undefinedresult Offending Command: Show" when he prints to an HP MFP Color printer. He has MacOS High Sierra installed on his MacBook with the latest Uniprint Popup installed. I have tried the custom HP driver for the printer, the Generic PostScript printer, and the Generic PCL printer drivers and each one will print out the same error message. The popup is coming up as it should and they are accepting the charge. When they scan their badge on the printer it shows the print job and they choose print. But what is printed on the paper is this error message. They are trying to print from MS Word. I have reinstalled OS Office. Also, they are using the Calibri font.

I've heard reports that HP is currently releasing new firmware (Futuresmart 3.9.1, I believe) for their printer models, and this is resolving the issue. At this time, only few models have the new version available, but I'm hoping the new version for the other models is released soon.

I can also vouch for the HP firmware updates (3.9.1). We had several other models not listed (e.g. M602/603) that we updated as well. We also noticed some slowness in printing on those devices to discover that they were still operating on FutureSmart version 2, so we changed that to version 3 and have seen improvements.

As Alex said, newly released firmware for select printers appears to fix the problem.

For our "FutureSmart 3" devices, we too have found update 3.9.1. (version number starts with "2308955"), released by HP on March 1, 2018, fixes the problem quite nicely. HP specifically listed this problem among the fixes for this firmware version.

For our "FutureSmart 4" devices, (or FutureSmart 3 devices that have been "upgraded" to FutureSmart 4 firmware), the current publicly available firmware (update 4.5.0.1) dated Dec. 8, 2017 does NOT fix this error. However, HP has new firmware 4.5.6 for the FutureSmart 4 devices that is supposed to be publicly available soon (that's what I heard April 2), however it does not yet appear to be available publicly yet (perhaps they found some issue). I was fortunate enough to get advance access and have been trying it on a number of my printers ... and it appears to fix the issue (along with some other things), though I've had one report (just one) of a document that still came through with the error..

For the FutureSmart 4 devices, watch closely for the firmware 4.5.6 (or newer) to be released soon.